Week+5...+10-5+to+10-9

Mon 10/5 - #'s 42,65-67,69, complete student survey (link below) & REVIEW ANY OLD PROBLEMS THAT ARE STILL HARD :)


 * STUDENT SURVEY (100% totally anonymous...be honest!) - ** http://goo.gl/forms/evw2Y3Wo1q


 * Isotopes & Ions PowerPoint: ** [[file:Isotopes & Ions.pptx]]

Tues 10/6 - Read 4.8 & 4.9, #'s 43-46,52,54,56,57,60 (don't forget to fill out the student survey too! see link above.)

Wed 10/7 - Complete online student survey, #'s 75,80,82,84

Thurs 10/8 - Study for Chapter 4 Exam, OPTIONAL Book Problems = #'s 89,91,93,94,95,106,109

Fri 10/9 - Study for Chapter 4 Exam, OPTIONAL Book Problems = #'s 89,91,93,94,95,106,109


 * ANSWERS TO ODD NUMBER OPTIONAL HW ?s (Answers to even numbers are in the back of the book) : **


 * 89)The atomic number represents the number of protons in the nucleus; the mass number represents the total number of protons and neutrons. No two elements have the same atomic number, but two elements could have the same mass number **


 * 91) Yes, the law of constant composition (#4 in Dalton's atomic theory) says that all molecules of the same compound will have the same elements in the same proportion, but two elements can an do form more than one compound. Examples: water (H2O) & hydrogen peroxide (H2O2) **


 * 93)FeO & Fe2O3 **




 * 109) a- C, Z=6, nonmetal **
 * b- Se, Z=34, nonmetal **
 * c- Rn, Z=86, nonmetal & noble gas **
 * d- Be, Z=4, metal & alkaline earth metal **